That's a useful list, thanks. I went to La Chope des Puces one Saturday afternoon for lunch and then sat for a couple of hours or more listening to the GJ and drinking coffee. A sparse venue but a good atmosphere, still much like the clip from 1965 which you can see if you follow the link in the article. If you go then go early, unless you are happy to stand. There are perhaps half a dozen tables and hardly enough room to swing a minor.
Le Q is more comfortable.